Configure Mozilla Thunderbird 16.0 and Up for Comcast.net Email

Learn how to set up your Mozilla Thunderbird client to work with Comcast.net email.

Using third-party email clients (e.g., Outlook, Apple Mail, Thunderbird, etc.) to access your Comcast.net email address can potentially expose your Xfinity ID and password to fraud and other risks. We recommend you access your Comcast email by going to Xfinity Connect and clicking Email, or by using the Xfinity Connect app on your mobile device.

Quick Links:

Configure Mozilla Thunderbird 16.0 and Up

  1. Open Mozilla Thunderbird.
  2. Go to Accounts > Set up an account, then click Email.
    Click the Email button under the 'Set up an account' option.

    You can also go to the Tools menu and select Account Settings. Click the Account Actions drop-down box in the bottom left, then select Add Mail Account...
    Find the Account Settings option in the Tools drop-down.
     
  3. Enter your name, email address and password, then click Continue.
    Enter your name, email, and password, then click continue.
     
  4. Make sure IMAP (remote folders) is selected.
    Select the IMAP button before clicking Done.
     
  5. Click Done and you’ll be all set! You can now access your Comcast.net account using Thunderbird.

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Manually Configure Incoming (IMAP) and Outgoing (SMTP) Server Settings

Configure IMAP Settings
  1. Go to the Tools menu and click on Account Settings, or right-click on your email address and select Settings.
    You can right-click on your email address to find the Settings option.
     
  2. Click on Server Settings.
  3. Change your settings as desired, then click OK.
    For Comcast.net emails, we recommend the following settings:
    • Server Name: imap.comcast.net
    • Port: 993
    • Connection Security: SSL/TLS
    • Authentication Method: Normal password
    • Check for new messages at startup: Yes
    • Check for new messages: Every 10 minutes
    • Allow immediate server notifications when new messages arrive: Yes
    • When I delete a message: Move it to this folder: Trash
      Set up your Server Settings as recommended, then click OK.

Configure SMTP Setting
  1. Go to the Tools menu and click on Account Settings, or right-click on your email address and select Settings.
  2. Click Outgoing Server (SMTP).
  3. Click Edit…
  4. Change your settings as desired, then click OK.
    For Comcast.net emails, we recommend the following settings:
    • Description: Comcast
    • Server Name: smtp.comcast.net
    • Port: 465
    • Connection Security: SSL/TLS
    • Authentication Method: Normal password
      Review your Account Settings before clicking OK.
       
  5. On the Account Settings page, click OK.

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